Alexandria Digital Research Library

Steady-state one-dimensional pressure-driven pipe flow of polymer solutions with concentration-stress coupling

Author:
Dhane, Yassine
Degree Grantor:
University of California, Santa Barbara. Chemical Engineering
Degree Supervisor:
Glenn H. Fredrickson and Gary L. Leal
Place of Publication:
[Santa Barbara, Calif.]
Publisher:
University of California, Santa Barbara
Creation Date:
2016
Issued Date:
2016
Topics:
Chemical engineering
Keywords:
Pipe flow
Spurt
Pressure-driven flow
Polymer solutions
Instability
Concentration-stress coupling
Genres:
Dissertations, Academic and Online resources
Dissertation:
M.S.--University of California, Santa Barbara, 2016
Description:

A new approach to model the flow of polymer solutions is investigated. The flow behavior of these materials has been under investigation for decades without reaching a consistent explanation of the observed phenomena such as shear banding in shear flow and the spurt phenomena in pressure-driven pipe. In this investigation, we explore the coupling of the mass transport and the viscoelastic dynamics and its influence on the flow of polymer solutions in pipes. We implement a predictive constitutive model for polymer solutions that reproduces observed flow behaviors using scaling arguments to estimate material properties from a minimal number of measured quantities. The inherent existence of multiple solutions to the model's system of equations allows for the prediction of sudden increases of flow rate in a pressure-driven channel flow is reported due to a stress-induced depletion layer at the pipe wall of the size of the correlation length of the solution. This investigation bridges the gap between theoretical studies that focus on the interfacial physics and those that focus on the bulk flows to explain the spurt phenomena of polymer solutions.

Physical Description:
1 online resource (34 pages)
Format:
Text
Collection(s):
UCSB electronic theses and dissertations
ARK:
ark:/48907/f3n58mj2
ISBN:
9781369340990
Catalog System Number:
990047189240203776
Rights:
Inc.icon only.dark In Copyright
Copyright Holder:
Yassine Dhane
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